spidermonkey-dev.sh

sudo add-apt-repository -y ppa:mercurial-ppa/releases
sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
sudo apt update
sudo apt upgrade -y
sudo apt install mercurial autoconf2.13 gcc-7 g++-7 make python-pip -y
pip install hg-git
cat <<EOF > ~/.hgrc
[extensions]
hgext.bookmarks =
hggit =
EOF
hg clone http://hg.mozilla.org/mozilla-central spidermonkey
cd spidermonkey/js/src
autoconf2.13
mkdir build_DBG.OBJ
cd build_DBG.OBJ
../configure --enable-debug --disable-optimize CC=gcc-7
make -j5